High-pressure hand gun



l25 1927 Oct w. H. oPlTz HIGH PRESSURE HAND GUN 'Filed June 25. 1926 En Uff/1.5

tion

Patented ct. 25, 1927.,l

UNITED STATE E. FITZ, 0F CLEVELAND, OIEHO, ASSGNOR 'lLO THE IVIBJVEL EQUIPMENT IGOMPANY, 0F CLEVELAND, 01H10, A CORPGRATON OF OHO.

HIGH-PRESSURE HND GUN.

- .application med une 2`5,

This invention relates to lubricating means and more vvparticularly to means for supplying lubricant under a'relatively high pressure to'bearings and various other parts of an automobile orthe like.

One object of the invention is to provide a simple, reliable, efficient and preferably portable lubricating 'device by means of which a lubricant may be forced into bearings offering high resistance to passage of the lubricant.

Another object is to provide device comprising a low pressure lubricant supplying means and a communicating high pressure lubricant supplying means in which leakage of grease from the hi h pressure means is prevented when the device is not in use.

Another object is ,to provide a high p ressure grease gun which is simple and eiiicient and adapted to meet the various requirements under service conditions.4

These andother objects are accomplished by .means ofthe arrangement disclosed en the accompanying `sheet of drawings, in which- Figure 1 is a Vertical longitudinal sectional view of a low pressure lubricant supplying means in combination with a high pressure lubricant supplying means shown in side elevation and embodying my inven- Figure 2 is a, vertical sectional viewthrough the high pressure lubricant supply ingmeans; and

igure 3 is a fragmentary enlarged detail `sectional view showing the control means whereby the ow of lubricant is controlled through said high pressure lubricant supplying means.

The various novel ifeaturesv of the invention will be ap arent from the following-description and rawings, and will be particularly pointed, out in the appended claims.

The invention is illustrated `in connection with a lubricant or grease kit including a. drum 1() containing lubricant which is to be pumped through ,various pressure stages into bearings and the like offering high resistance to the passage of the lubricant. Mounted in the drum 10 is a cylinder 11 of the low pressure pump in which a valved piston 12 is mounted for vertical reciprocatory movement. The piston is provided with a rod 13 connected at its upper end to a lubricating i926. Serial No. 118,40*?.-

otally connected at .17 to the cap 18 `of the pump cylinder 1l which cap preferably ts into the cover 19 of the drum 10. While the piston `12 is forced downwardly by a downward stroke of the handle 14 for permitting a flow of lubricant u through the portedpiston 12, a coiled spring 20 located below the piston and within the cylinder 11 1s compressed. When the handle 14 is released, the coiled spring 20 presses the lubricant above the piston with a pressure of about one hundred pounds per square inch, upand out through the upper end of the cylinder 11, through the hose 21 connected to the cylinder cap 1-8, and into the hollowl handle 22 of thel high pressure grease gun. During the upper stroke of the piston 12, grease will be drawn past the valve-23' in the bottom of the pump cylinder 11 and into the cylinder to form the next charge of lubricant to be forced up through the piston 112 upon the next downward stroke of the atter.

The hose 21 is connected to the hollow cant may iow fromtheshetll into the discharge nozzle. .ooperating with the dis-l charge nozzle 29 and shell 23J is a plunger 31 having a solid portion 32 which is operable in the nozzle for controlling the `ports 30 and the discharge under relatively high` pressure of lubricant from the discharge nozzle 29 The plunger 31 also has a hollow portion 33,. the open end of which is preferablyscrewed into an interior wall 31 within the handlel22 and has open communication with the hollow portion of the handlev 22 whereby lubricant may be forced from saidhandle through the hollow ortion 33 of the plunger. The hollow portion of the plunger 33 is provided with a plurality of ports 35, through which, under certain conditions, lubricant may flow from the hollow plunger 33 into the shell 28.` Normally, however, when the high pressure gun isnot in use, the ports 35 are covered bv the enlarged base portion 36 of the shell 28, asv

- in the discharge nozzle are open, lubricant may flow from the shell 28 into said discharge nozzle 29 which, of course, occurs as soon as the ports 30 are uncovered by the plunger due to a certain amount of suction which is created within the discharge nozzle upon the Withdrawal of the plunger toward the rear of the discharge-nozzle 29.

When it is desired to lubricate a bearing,

.the tip end 38 of the grease gun is placed against any suitable nipplel and forward pressure applied to the handle 22 of the grease gun which causes the barrel 26 and plunger 31 to move forwardly with respect to the discharge nozzle 29 and the shell 28, or in other words, causes the discharge nozzle 29 to telescope inwardly with respect to the barrel 26 and the shell 28. to move rearwardly within the barrel 26. During thisy movement lubricant which had been drawn into thev discharge nozzle is forced outwardly therefrom under high pressure as agresult'of the action of the plunger 31, and at the same time the ports 35 are uncovered for permitting the flowl of lubricant from the hollow handle 22 through the hollow portion 33- of the plunger 31 and into the shell 28. During this action it will be Aappreciated that the coiled spring 37 is compressed. "When pressure on the handle 22 is released, the handle 22 and the barrel 26 and plunger 31, under pressure of spring 37, will be moved in an opposite direction to assume the `position shown'in Figure 2, in which position further flow of lubricant through the hollow portion 33 of the plunger 31 into the shell l 28 is prevented and the flow of lubricant from the shell 28 into the discharge nozzle 29 is permitted. It will be understood, of course, that when the grease gun is not in use the 4discharge end will be normally closed by the spring-pressed ball valve 39. to prevent leakage.

By means of this arrangement the objects of the invention are accomplished.

1, A high pressure lubricant gun comprising a barrel, a shell for containing lubricant mounted in said barrel, a discharge nozzle connected to said shell and having 'portedcommunication with saidl shell, and a plunger having a portion through which lubricant is conveyed into saidl shell and having i another portion'operable in said discharge nozzle for forcing lubricant therefrom.

2. A high pressure lubricant gun .comprising a barrel, a shell for containing lubricanL mounted in said barrel, a discharge nozzle 'l connected to said shell `and having ported communication with said shell, and a plunger for controlling the supply of lubricant to said shell and for discharging lubricant under pressure from said dischargenozzle. l

for controlling the supply of lubricant to'.

said shell and for discharging lubricant under' pressure from said discharge nozzle.

4. A high pressure lubricant gun comprising a barrel, a shell for containing lubricant movably mounted in said barrel, a discharge i nozzle connected to said shell and telescopically arranged with respect to said barrel andhaving ported communication with said shell, and a plunger having a portion through which lubricant is conveyed into said shell, and having another portion operable in said'discharge nozzle for forcing lu- ',bricant therefrom.

5. A high pressure lubricant gun compris- A ing a barrel, a shell for containing lubricant movably mounted in said barrel, a discharge nozzle connected to said shell and telescopica-ily arranged with respect to said barrel and having ported communication with said shell, a plunger having a `portion through which lubricant is conveyed into said shell and having another -portion'operable in said discharge .nozzle for forcing lubricant therefrom, and means for normally holding the discharge nozzle in its outermost position with respect to said barrel.

t6. A high pressure lubricant gun comprising a barrel, a shell for containing lubricant movably mounted in said barrel, a dischargefjn nozzle connected to said shell and telescopi? cally arranged with respect to said barrel and having a port through which lubricant i may be drawn from said shell into said discharge nozzle, and a plunger having a port through which lubricant may be supplied "to said shell which port is closed when the plunger is in vone position with respect to said shell and open when in a different position with'respect to said shell, said plunger having a portion operable in said discharge nozzle for forcing lubricant therefrom.

7. A high pressure lubricant gun comprising a barrel, a shell for containing lubricant movably mounted 1n said barrel, a discharge,

nozzle connected to said shell and telescopically arranged with respect to said barrel and having a port through 4which lubricant may be drawn from said shell into said dis' charge nozzle, a plunger having a port through which lubricant may be supplied to said shell, which port is closed when the plunger is in one position with respect to said shell and open when in a different position with respect to said shell, said plunger nozzle connected to and communicating with said shell, and a plunger extending `into and cooperalingwith meansl in said shell and discharge nozzle whereby the supply of lubricant to said shell is controlled by said plunger, andthe discharge o lubricant from said discharge nozzle is controlled by said plunger.

9. A high pressure lubricant gun comprising a barrel, a shell movably` mounted in said barrel. a dischargenozzle having communication with said shell, and means havingdifferent portions for controlling the suppl)Y of lubricant into said shell and from said shell into said discharge nozzle, and the discharge from the latter.

10. A. high pressure lubricant gun comprising a barrel having a handle for containingr and transu'iitting a lubricant,y a shell morably mounted' in said barrel, a discharge nozzle connected to said shell having communication therewith,y and a plunger having a hollow portion through which a lubricant ma)Y besupplied from said hollow handle to said shell` said plunger controlling the flow of liquid from said handle to saidshell and from said shell to said discharge nozzle.

1l. A high pressure lubricant gun comprising a barrel having a handle for containing and transmitting a lubricant, a shell movably mounted in said barrel, a discharge nozzle connected to said shell having communication therewith, a plunger having a. 'hollow portion through which a lubricant may be supplied from said hollow handle to said shell, said plunger controlling the How of liquid from said handle to said shell and from said shell to said discharge nozzle, and means operable upo'riisaid shell normally for holding the shell in a position to prevent flow of lubricant from said handle to said shell and to permit the ilow of lubricant from said shell to said discharge nozzle.

12. A high pressure lubricant gun compris-ing `a barrel having a. handle having a passage therein communicating With said barrel and into which lubricant is fed, a. c

shell slidably mounted in said barrel and provided with a discharge nozzle havingmeans communicating with said shell, and a plunger extending into said nozzle and barrel and controlling the discharge of lubricant from said nozzle and having means cooperating with said shell for controlling flow of lubricant into said shell.

13. In a high pressure grease gun, the combination of a discharge nozzle communicating with a shell movabl mounted in a barrel, and means communicating with a source of grease, cooperating with a part of sald `nozzle and having an opening controlled by said movable shell for controlling the flow of grease into and out of said nozzle from said source and shell.

14.'In a high' pressure grease gun, the combination of a barrel, a shell having a discharge nozzle movably mounted in said barrel, and means controlled bythe movement of the shell for introducing grease into said shell, said means controlling the introduction of grease to .and expulsion of grease from said nozzle.

Signed at Cleveland, Ohio, this tWentyfirst day of June, 1926.

WM. H. OPIT-Z. 

